Datasheet Texas Instruments LM1770

ManufacturerTexas Instruments
SeriesLM1770
Datasheet Texas Instruments LM1770

Low-Voltage SOT23 Synchronous Buck Controller With No External Compensation

Datasheets

LM1770 Low-V SOT23 Synch Buck Cntrr w/No Ext Compensation datasheet
PDF, 862 Kb, Revision: C, File published: Apr 3, 2013
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Prices

Status

LM1770SMF/NOPBLM1770TMF/NOPBLM1770TMFX/NOPBLM1770UMF/NOPBLM1770UMFX/NOPB
Lifecycle StatusActive (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)
Manufacture's Sample AvailabilityNoNoYesYesNo

Packaging

LM1770SMF/NOPBLM1770TMF/NOPBLM1770TMFX/NOPBLM1770UMF/NOPBLM1770UMFX/NOPB
N12345
Pin55555
Package TypeDBVDBVDBVDBVDBV
Industry STD TermSOT-23SOT-23SOT-23SOT-23SOT-23
JEDEC CodeR-PDSO-GR-PDSO-GR-PDSO-GR-PDSO-GR-PDSO-G
Package QTY10001000300010003000
CarrierLARGE T&RLARGE T&RLARGE T&RLARGE T&RLARGE T&R
Device MarkingSKJBSKKBSKKBSKLBSKLB
Width (mm)1.61.61.61.61.6
Length (mm)2.92.92.92.92.9
Thickness (mm)1.21.21.21.21.2
Pitch (mm).95.95.95.95.95
Max Height (mm)1.451.451.451.451.45
Mechanical DataDownloadDownloadDownloadDownloadDownload

Parametrics

Parameters / ModelsLM1770SMF/NOPB
LM1770SMF/NOPB
LM1770TMF/NOPB
LM1770TMF/NOPB
LM1770TMFX/NOPB
LM1770TMFX/NOPB
LM1770UMF/NOPB
LM1770UMF/NOPB
LM1770UMFX/NOPB
LM1770UMFX/NOPB
Control ModeConstant on-time (COT)Constant on-time (COT)Constant on-time (COT)Constant on-time (COT)Constant on-time (COT)
Duty Cycle(Max), %9898989898
Iout(Max), A44444
Iq(Typ), mA0.40.40.40.40.4
Number of Phases11111
Operating Temperature Range, C-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125
Package GroupSOT-23SOT-23SOT-23SOT-23SOT-23
RatingCatalogCatalogCatalogCatalogCatalog
Regulated Outputs11111
Special FeaturesLight Load EfficiencyLight Load EfficiencyLight Load EfficiencyLight Load EfficiencyLight Load Efficiency
Switching Frequency(Max), kHz20002000200020002000
Switching Frequency(Min), kHz500500500500500
TypeControllerControllerControllerControllerController
Vin(Max), V5.55.55.55.55.5
Vin(Min), V2.82.82.82.82.8
Vout(Max), V4.54.54.54.54.5
Vout(Min), V0.80.80.80.80.8

Eco Plan

LM1770SMF/NOPBLM1770TMF/NOPBLM1770TMFX/NOPBLM1770UMF/NOPBLM1770UMFX/NOPB
RoHSCompliantCompliantCompliantCompliantCompliant

Application Notes

  • AN-1414 LM1770 Design Reference (Rev. A)
    PDF, 226 Kb, Revision: A, File published: Apr 23, 2013
    This application report presents several reference designs that can be used to implement the TexasInstruments LM1770 Synchronous Buck Controller in a wide variety of configurations.
  • Advanced Topics in Powering FPGAs
    PDF, 645 Kb, File published: Mar 22, 2007
  • Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A)
    PDF, 178 Kb, Revision: A, File published: Apr 23, 2013
    Of all the voltage regulator control strategies ever devised, the hysteretic regulator is probably about thesimplest. This control methodology simply turns a switch on when the output voltage is below a referenceand turns the switch off when the output rises to a slightly higher reference. The output ripple is thereforea direct function of the difference between the upper and lower reference

Model Line

Manufacturer's Classification

  • Semiconductors> Power Management> Non-isolated DC/DC Switching Regulator> Step-Down (Buck)> Buck Controller (External Switch)
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